Mailing List Archive Mailing List Archive
On your first point DIR rec diving does not call for a dual first stages. On your second point the "cave diving community" is without a doubt the worse group of idiots you could possibly have called up as an example of doing anything right. The majority of cave divers are a bunch of narcosis junkies who's goal is to achieve high PP of nitrogen in as easy a way as possible. On your third point when you hear an air leak how do you know which valve to close? by your logic you close both valves. That really helps things out. With an isolator you close that and then you instantly save 1/2 of your gas. With a single by the time you sit there trying to figure out which valve to turn off and which reg to use you are shit out of luck. You are either tech diving or you are not. If your stupid Y valve is so darn great why is it not a standard? The standard with rec diving is to head to the surface not sit there wrestling with regs and valves. The standard with tech diving is doubles and I'm afraid that you will have a rather hard time arguing that point with anybody with half a brain. If you have read any of my posts you know my feeling about ponies, never mind other schemes. Jim ------------------------------------------------------------------- Learn About Trimix at http://www.cisatlantic.com/trimix/ > From: RDecker388@ao*.co* > Date: Sat, 7 Jul 2001 22:57:10 EDT > To: cobber@ci*.co*', techdiver@aquanaut.com > Subject: Re: Y - valve > > In a message dated 7/6/01 4:01:30 PM Eastern Daylight Time, > cobber@ci*.co* writes: > >> IMHO, if you are not diving doubles then you should not be getting in >> virtual or real overhead conditions (i.e. caves, wrecks or deco) so you >> might as well be a rec diver. Being a rec diver means being able to head to >> the surface under any emergency condition. Your failure mode for most if > not >> all issues is a controlled ascent to the surface. >> >> Other than that you are fooling yourself using H, Y or whatever systems. If >> anything it could make matter worse by introducing CF factors into a simple >> rec rig. >> >> My reasoning on this is to have enough gas to deal with a problem on the >> bottom even after isolating the valve with the problem, impossible to do >> with a H or Y valve. >> >> Doubles vs. Singles is more an issue of convenience and logistics. You > can't >> make a silk purse out of a sows ear so if your gonna do it, do it right. >> Don't overhead dive without doubles. > > > BS! "Doing it right" means only dragging along that equipment necessary for > the dive at hand. If the dive can be executed using a single tank, staying > with the proper rules of gas management, then flying doubles would be "doing > it wrong." > > The cave diving community has long used dual outlet valves on single tanks > for "Intro" level cave and cavern dives with great success. Most likely > thousands and likely more accurately tens of thousands of wreck divers are > executed along the US East Coast using single tanks equipped with dual outlet > valves each year. > > With practice it takes but a few seconds to isolate a free-flowing regulator > using a H valve. The amount of gas lost in such situations should be > insignificant assuming proper gas management techniques are being applied. > In a worst case scenario the teamate's (buddy's) reserve gas supply serves to > provide the required redundancy. > > What's next, an endorsement for carrying bail-out bottles diving single tanks? > > Bob D. > www.SportDiverHQ.com > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]